Parcel CreationObjectivesNotesStudent ExercisesParcel CreationKey TermsQuestionsAnswersModule SummaryNOTES Module 7 Parcel Creation In this module, you learn how to create parcels and apply label styles to the parcels. Parcel layout is a critical part of the subdivision design process and is a balance between the desires of the developer, public regulators, and private and special interest groups. Most state and/or local regulations contain references to minimum setback distances from parcel boundaries, minimum areas, and so on. The overall site may have constraints on the amount of open space or the amount of runoff that is allowed to drain off a site. Developments also can hold various types of land use, such as single-family conventional or cluster housing, multifamily units, commercial buildings, and open space; all of which may have separate regulations. Objectives After completing this module, you will be able to: Create a right-of-way (ROW). Create parcels using the layout tools. Create parcels from objects. Renumber parcels. Edit parcel segments. Label parcels with bearings and distances. Label parcels with tags. Create a parcel table. Export and view LandXML parcel reports.AutoCAD Civil 3D 2008 Education Curriculum NOTES Notes This module introduces you to the process of creating and labeling parcels. Data for this module resides in the \AutoCAD Civil 3D 2008 Education Curriculum\Module 07 - Parcel Creation\ folder. Student Exercises The following exercises are provided in step-by-step format. Open the AutoCAD Civil 3D program prior to beginning the lesson by double-clicking the Civil 3D icon on your desktop. You working in the Imperial system should use the drawing files beginning with an I, while those working in the metric system should use the drawing files beginning with an M. You are provided with a drawing for each exercise. The exercises in this module are as follows: 1. Create a Right-of-Way 2. Create Parcels Using Layout Tools 3. Create Parcels from Objects 4. Edit and Renumber Parcels 5. Label Parcels 6. Create a Parcel Table 7. Export and View XML Parcel Reports 07-2Module 07 - Parcel Creation NOTES Parcel Creation The term subdivision refers to the division of a larger parcel into smaller parcels. AutoCAD Civil 3D uses the term site to represent a group of objects such as alignments, feature lines, and grading groups that can interact with each other. The site is a topological organization of these objects and their associated data, which allows interaction between the objects. For example, a block parcel, or boundary parcel, can be subdivided into smaller parcels because of the shared topology in the site. There will be no parcel overlaps or leftover slivers that are not part of a parcel because of this shared topology. A site does not necessarily relate to all objects in a particular area. Drawings can have multiple sites, each of which can have associated objects and can be located in the same block parcel. Parcels are intelligent objects in AutoCAD Civil 3D that can be either created from objects or by using the Civil 3D parcel layout tools. When you create parcels from objects, you select lines, polylines, and arcs created with standard AutoCAD drafting techniques. When you use the parcel layout tools, you create parcels based on minimum area or road frontage criteria. The final designed parcels, sometimes called lots, form the basis for the subdivision plat, which is the legal document describing the boundaries of the parcels. You begin this module by creating a boundary parcel, the major alignment that bisects the site, and a right-of-way buffer for the alignment. Creating the alignment and right-of-way effectively divides the boundary parcel into a northern and southern parcel. The northern parcel of the site is subdivided using both manual and automatic parcel layout tools, focusing on road frontage and parcel area as the key design parameters. The southern parcel of the site uses a technique of creating parcels from existing polylines. You then perform final geometry edits on the parcels and renumber them sequentially. 07-3AutoCAD Civil 3D 2008 Education Curriculum NOTES Labeling requirements for parcels varies according to the client and the engineering company. You use several tools and styles for labeling lines, curves, and areas. Tags are utilized along with tables to organize the parcel data. Finally, the parcel data is exported to LandXML format, and the Autodesk LandXML Reporting program is used to choose an appropriate report type, customize it, and view the information. Key Terms Site A site is a topological collection of objects such as alignments, feature lines, and grading groups that can interact with each other. Drawings can have multiple sites, each of which can have associated objects. Right of Way A right-of-way (ROW) is a buffer placed around a horizontal road alignment in order to provide legal access for the government outside of the actual roadway for utilities or improvements. Road Frontage The length of a parcel segment adjacent to the road. This is a commonly used design parameter for parcels. Parcel, Lot Parcel and lot are synonymous terms, used interchangeably in the land development business. Both refer to a legally-defined piece of land. Parcel Area The area of the parcel in imperial (acres, sq. ft.) or metric (hectares, sq. m.) units. Area is often used as the primary design parameter for parcels. Parcel Tables If tags are used, a table listing all of the line or curve tags and their respective information are inserted into the drawing to organize the information. Tags Tags, or tag labels, are a shorthand method of labeling lines or curves. A line label is normally L1, L2, etcetera, and a curve label is C1, C2, etcetera. Using tags reduces the amount of text directly around or inside the parcel, making the drawing more readable. LandXML LandXML is the standard form of XML (extensible markup language) used in land development software for purposes such as exporting data to other applications or viewing reports on design objects. Topology Topology defines the spatial relationship between objects. Topology can be thought of as a set of rules that enforce behavior among objects. For example, a subdivided parcel cannot extend past the boundaries of the parcel from which it was subdivided; it must be contained
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